I trade spreads. Occasionally my short calls get exercised early, so suddenly I have to buy some stock. If my margin is sufficient I can easily exercise my long calls when I find out about the early exercise and no harm is done. IB does not provide a way to automatically exerise my long calls in that situation (as far as I can determine). Does anyone know if there is third party software that can handle the situation where if a short call is exercised early, a user-selected long call will automatically be exercised also? The potential danger (recently experienced by me) is when the margin is not sufficient to handle the exercised short calls, then IB starts liquidating computer selected positions to raise the cash. When that occurs while you are not watching, the underlying stock can drop in price before you get the chance to exercise your long calls - resulting in a loss, possibly a lot! So I have to keep a close eye on margin vs. worst case situations. Thanks in advance.